Why not? You can even add email conversations... but it all has to be meaningful and serious.
In literature review, it is better to use the highly cited papers or the article which authored by a scientist which has highest H-index. https://www.academia.edu/1738979/How_to_Conduct_a_Literature_Review
In a literature review it is best to rely on peer-reviewed sources. But other sources that are judged to have high reliability may also have a role, in some cases.
For example, in the Mass Communication topic area, where you have entered this question, it may be appropriate in selected cases to cite news reports from recognized professional sources. It may be appropriate to use information from a web page that is not peer reviewed if the author has recognized expertise (such as related peer-reviewed publications). But you will likely also have to make these differences from academic peer reviewed sources clear in your paper, if it is not clear from the context.
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